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| 1 | + GNU GENERAL PUBLIC LICENSE |
| 2 | + Version 3, 29 June 2007 |
| 3 | + |
| 4 | + Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> |
| 5 | + Everyone is permitted to copy and distribute verbatim copies |
| 6 | + of this license document, but changing it is not allowed. |
| 7 | + |
| 8 | + Preamble |
| 9 | + |
| 10 | + The GNU General Public License is a free, copyleft license for |
| 11 | +software and other kinds of works. |
| 12 | + |
| 13 | + The licenses for most software and other practical works are designed |
| 14 | +to take away your freedom to share and change the works. By contrast, |
| 15 | +the GNU General Public License is intended to guarantee your freedom to |
| 16 | +share and change all versions of a program--to make sure it remains free |
| 17 | +software for all its users. We, the Free Software Foundation, use the |
| 18 | +GNU General Public License for most of our software; it applies also to |
| 19 | +any other work released this way by its authors. You can apply it to |
| 20 | +your programs, too. |
| 21 | + |
| 22 | + When we speak of free software, we are referring to freedom, not |
| 23 | +price. Our General Public Licenses are designed to make sure that you |
| 24 | +have the freedom to distribute copies of free software (and charge for |
| 25 | +them if you wish), that you receive source code or can get it if you |
| 26 | +want it, that you can change the software or use pieces of it in new |
| 27 | +free programs, and that you know you can do these things. |
| 28 | + |
| 29 | + To protect your rights, we need to prevent others from denying you |
| 30 | +these rights or asking you to surrender the rights. Therefore, you have |
| 31 | +certain responsibilities if you distribute copies of the software, or if |
| 32 | +you modify it: responsibilities to respect the freedom of others. |
| 33 | + |
| 34 | + For example, if you distribute copies of such a program, whether |
| 35 | +gratis or for a fee, you must pass on to the recipients the same |
| 36 | +freedoms that you received. You must make sure that they, too, receive |
| 37 | +or can get the source code. And you must show them these terms so they |
| 38 | +know their rights. |
| 39 | + |
| 40 | + Developers that use the GNU GPL protect your rights with two steps: |
| 41 | +(1) assert copyright on the software, and (2) offer you this License |
| 42 | +giving you legal permission to copy, distribute and/or modify it. |
| 43 | + |
| 44 | + For the developers' and authors' protection, the GPL clearly explains |
| 45 | +that there is no warranty for this free software. For both users' and |
| 46 | +authors' sake, the GPL requires that modified versions be marked as |
| 47 | +changed, so that their problems will not be attributed erroneously to |
| 48 | +authors of previous versions. |
| 49 | + |
| 50 | + Some devices are designed to deny users access to install or run |
| 51 | +modified versions of the software inside them, although the manufacturer |
| 52 | +can do so. This is fundamentally incompatible with the aim of |
| 53 | +protecting users' freedom to change the software. The systematic |
| 54 | +pattern of such abuse occurs in the area of products for individuals to |
| 55 | +use, which is precisely where it is most unacceptable. Therefore, we |
| 56 | +have designed this version of the GPL to prohibit the practice for those |
| 57 | +products. If such problems arise substantially in other domains, we |
| 58 | +stand ready to extend this provision to those domains in future versions |
| 59 | +of the GPL, as needed to protect the freedom of users. |
| 60 | + |
| 61 | + Finally, every program is threatened constantly by software patents. |
| 62 | +States should not allow patents to restrict development and use of |
| 63 | +software on general-purpose computers, but in those that do, we wish to |
| 64 | +avoid the special danger that patents applied to a free program could |
| 65 | +make it effectively proprietary. To prevent this, the GPL assures that |
| 66 | +patents cannot be used to render the program non-free. |
| 67 | + |
| 68 | + The precise terms and conditions for copying, distribution and |
| 69 | +modification follow. |
| 70 | + |
| 71 | + TERMS AND CONDITIONS |
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